Scott 2000 Tailwheel

[swift1b]

I removed the Scott 200 tailwheel last evening because it did not seem to be locking as it should. I washed out the arm assembly with solvent and noticed that the cams on the levers did not seem to grip the flat notches in the fork bolt as it should. How much wear is acceptable? Are there arms available and sold separately? Aircraft Spruce has a price of $456.00 for the arm assembly which is a bit too steep for me. Is it difficult to take the assembly apart?
Sincerely appreciate comments from you folks who have been there and done that. I searched the threads and so far have not found any that address this. Also, is there an illustration available that show the details of the arms and how they interact with the notched fork bolt?

Regards to all...........bob

[Edwin Otha]

Re: Scott 2000 Tailwheel

Bob,
I use a tailwheel from Aviation Products, in Ojai,CA. It works great and parts are reasonably priced. It is their 6" double fork model.
EO

[swift1b]

Re: Scott 2000 Tailwheel

Thank you for sharing this source. The Scott 2000 I have is in good condtion except the cam surface on the arms appears to be worn and not holding the tailwheel adequately in the locked position. I would like to locate a sketch showing the original cam surface on the ends of the arms.

regards, bob

[Hank Jarrett]

Re: Scott 2000 Tailwheel

Can you tell (or does anyone know) what the material is of the parts that are worn? A good welder may be able to build up the surface, which you can grind back to the original profile.
This is one of the reasons I pull my tail wheel every annual, tear it down, inspect and lube it and clean up the paint on all the parts. Tail wheels take a bad beating!
Hank

On the first inspection I found rust and lack of lube. On the most recent, one of the spring clips that hold the rudder arms to the springs failed when I removed it. The second one broke when I twisted it to see how much was left. I made new ones from thicker Stainless (made them enough thicker to match the strength of the steel hooks that rusted...most stainless is weaker for the same cross section than regular steel).

[dmcneil]

Re: Scott 2000 Tailwheel

Hi Bob,

I don't have a sketch of the steering arm. I can tell you that the surface of the arms that contact the machined flats/grooves at the top of the yoke axle are perfectly flat and straight on a new steering arm. The Scott 3-24B mechanism uses steering spring tension (25-30 lbs) to clamp those steering arms to the yoke axle for steering. Many folks don't have enough tension on the steering arms which can lead to wear and low break-out forces.

As far as I know, you can't buy just the steering arms... you have to buy the assembly. It's expensive as you found out! I've never attempted to repair a steering arm assembly so no help there. Sorry.

The 3-24B tailwheel manufacturing is now owned by AVOX Systems.

http://www.avoxsys.com

A call to them might get you a drawing of the steering arm...

Dan

[Hank Jarrett]

Re: Scott 2000 Tailwheel

The drawing should show the material. If they won't give you the drawing at least see if they will give you the material used. I'm still betting if someone will trace the part a good welder can build it up and you can fix it.
Hank

[swift1b]

Re: Scott 2000 Tailwheel

Dan

Sorry for the late response. So far i have not been able to get through to AVOX. They have a website but there is no information regarding the Scott tailwheels.

Thanks again..... bob

[swift1b]

Re: Scott 2000 Tailwheel

Hank

Sorry for the late response. Have been on a "fly about"... I agree that these arms can be bult up by welding and then regrinding to the correct, flat shape. I removed the tailwheel yesterday and will attept to disassemble the two disks that contain the arms. They appear to have flst pins or maybe rivets. Do you have any knowledge as to how they come apart?

Thank you for sharing your thoughts.....

Regards, bob

[Hank Jarrett]

Re: Scott 2000 Tailwheel

I haven't taken mine apart since the last annual. I seem to remember the two pins but don't remember needing to remove them. Wish I had taken photos the last time (I will this time to document the problem areas). Can you take photos of the pieces, especially the worn parts?
Hank

I know the welder I worked with was really good at telling what type of steel he was working with by looking at the sparks it made. Looked like black magic to me, but he got it right each time! Do you want me to ask him what he would want to weld and grind yours? He might be able to use mine as a template for the profile.

[swift1b]

Re: Scott 2000 Tailwheel

Hank

Thank you for your response. The 2 round disks are held together with 2 pins (rivets?) that appear to be around 1/4 inch or less in diameter. My best guess is that they are pins that are pressed fitted. Once I get them apart I will build up with weld and reshape them to provide a flat surface to lock into the groove on the yoke bolt. But before final assembly I will defininitly harden the steel to prevent future wear as much as possible. Do you know if they are pins or rivets? That would be a big help. If I can't press them out I will just have to drill them out and fabricate new ones. The design of these culprits are rather of the horse and buggy vintage and definitely not "rocket science"!

Thanks again.......................bob

[Hank Jarrett]

Re: Scott 2000 Tailwheel

Man, I have to look at it again this weekend (if I don't blow out of here Wednesday for a sanity day at the airport). I know I lubed it but I can't remember now how.
Hank

[dmcneil]

Re: Scott 2000 Tailwheel

Hi Bob,

The AVOX website does have the various Scott tailwheels listed... you just need to search a little harder. Here's the link:

http://www.avoxsys.com/Products/Assets/GeneralAviationProductPages/TailWheelAssemblies.htm

It's not much info but that's all they have on the website. Keep trying to call AVOX. If you intend to repair that steering arm, you're going to need a drawing or some sort of approved data to make a legal repair.

I believe the "pins" that hold the steering arms in place are steel rivets. Not certain, though. I've always cringed at the replacement price for the steering arm assembly but figure it's cheaper in the end to have the correct new part rather than a questionable repaired part... especially something as important as that steering arm assembly. Others will have different opinions of course. Talk to your AP/IA about your intentions.

Dan

[swift1b]

Re: Scott 2000 Tailwheel

Hank

Have disassembled the arm assembly for the Scott 2000. Very simple construction and design. I intend to build up the worn portions with weld and reshape them. I will run this past my A&P to be legal or may use it on my Pitts S1-S since it is in the experimental category. Will take photos and post in the future share on the web site.

Regards, bob

[Hank Jarrett]

Re: Scott 2000 Tailwheel

Trace the shape of the contact area before and after the weld and re-contour too. If it works right that template will be very valuable to the next guy who has to do it.
Hank

Nothing happens once on a Taylorcraft!

[NY86]

Re: Scott 2000 Tailwheel

I'm pretty sure i have a new one around, but it will be at least a couple of weeks before I can get to where I think it is...